aes RYDBERG: PHYTOGEOGRAPHICAL NOTES 
Gnaphalium Grayit Agoseris attenuatat 
Senecio pudicust Agoseris arachnoideat 
Senecio anacletust Agoseris maculata} 
Senecio atratust Agoseris leptocarpat 
Agoseris purpureat Ptilocalais tenutfoliat 
A goseris arizonicat Leontodon mexicanust 
G. SALT AND ALKALI MEADOWS 
Where the soil contains salt or alkali, the meadow is more or 
less modified. While the salt and alkali meadows are very common 
in the Submontane Zone, in the Montane Zone they are uncommon, 
as the drainage as a rule is much better. In the South Park of 
Colorado, however, there are salt or alkali meadows of great ex- 
tent. This may also be the case in the other two large parks. 
They are common in the St. Louis Valley, but this is mostly below 
the Montane Zone. The vegetation contains among others the 
following species :— 
Triglochin palustris Dondia erecta . 
Triglochin maritima Sarcobatus vermiculatus 
Alisma brevipes Monolepis Nuttalliana 
Puccinellia Nuttallir Ranunculus sceleratus 
Spartina gracilis Halerpestes Cymbalaria 
Distichlis stricta Plantago eriopoda 
Agropyron Smithii Arnica foliosa 
Agropyron molle Tetradymia inermis 
Elymus simplex 
H. DRY VALLEYS AND BENCHLANDS 
The general description of this formation and a list of the 
grasses it contains are given in a previous paper.* The list of 
grasses will here be omitted. The other plants making up the 
flora are as follows: 
I. EASTERN OR TRANSCONTINENTAL 
Carex siccata Plantago eriopoda 
Polygonum buxiforme Laciniaria punctata 
Lepidium densiflorum Chrysopsis villosa 
Anogra latifolia - Rudbeckia hirta 
Anogra coronopifolia Solidago glaberrima 
Plantago Purshit 
* See Bull. Torrey Club 42: 637-638. 1915. 
